User Guide

3RT1 contactors/ 3RH1 control relays
SIRIUS System Manual
3-40 GWA 4NEB 430 0999-02 DS 01
3.3.4 3RT13 and 3RT15 contactors with 4 main contacts
Model There are two variants of the contactors with 4 main contacts:
• 3RT13 with 4 NO contacts
• 3RT15 with 2 NO + 2 NC contacts
You can use the same accessories for both the 3-pole SIRIUS contactors
and the 4-pole variants.
Field of application The following table gives the fields of application for the 3RT13 and 3RT15
contactors:
Auxiliary contact The following table specifies the maximum number of auxiliary contacts
that can be attached:
Contactor combination
with mechanical inter-
locking
The 4-pole 3RT13 contactors with 4 NO contacts as main contacts in frame
sizes S0 to S3 are suitable for putting together contactor combinations with
mechanical interlocks for use in supply switch-overs.
3RT13 contactors with 4 NO
contacts
3RT15 contactors with 2 NO + 2 NC
contacts
• Switching of resistive loads
• Isolation of networks with
ungrounded or badly
grounded neutral conductors
• Supply switch-overs in the
case of alternative AC power
supplies
• As a contactor - for example,
in variable-speed drives that
only have to carry the current,
not switch it
• Pole switch-over in the case of
crane-type motors
• Switching of 2 separate loads
• Breaking contactor
Table 3-15: Applications of 4-pole contactors
Frame size S00 Frame size S0 Frame sizes S2 and S3
4 auxiliary contacts Maximum 2 auxiliary con-
tacts (added on the side or
snapped on the front)
Maximum of 4 auxiliary
contacts
(added on the side or
snapped on the front)
Table 3-16: 4-pole contactors and auxiliary contacts